1 // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) 2 // 3 // This file is provided under a dual BSD/GPLv2 license. When using or 4 // redistributing this file, you may do so under either license. 5 // 6 // Copyright(c) 2018 Intel Corporation. All rights reserved. 7 // 8 // Author: Liam Girdwood <liam.r.girdwood@linux.intel.com> 9 // 10 // PCM Layer, interface between ALSA and IPC. 11 // 12 13 #include <linux/pm_runtime.h> 14 #include <sound/pcm_params.h> 15 #include <sound/sof.h> 16 #include "sof-priv.h" 17 #include "ops.h" 18 19 #define DRV_NAME "sof-audio-component" 20 21 /* Create DMA buffer page table for DSP */ 22 static int create_page_table(struct snd_pcm_substream *substream, 23 unsigned char *dma_area, size_t size) 24 { 25 struct snd_soc_pcm_runtime *rtd = substream->private_data; 26 struct snd_soc_component *component = 27 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 28 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 29 struct snd_sof_pcm *spcm; 30 struct snd_dma_buffer *dmab = snd_pcm_get_dma_buf(substream); 31 int stream = substream->stream; 32 33 spcm = snd_sof_find_spcm_dai(sdev, rtd); 34 if (!spcm) 35 return -EINVAL; 36 37 return snd_sof_create_page_table(sdev, dmab, 38 spcm->stream[stream].page_table.area, size); 39 } 40 41 static int sof_pcm_dsp_params(struct snd_sof_pcm *spcm, struct snd_pcm_substream *substream, 42 const struct sof_ipc_pcm_params_reply *reply) 43 { 44 struct snd_sof_dev *sdev = spcm->sdev; 45 /* validate offset */ 46 int ret = snd_sof_ipc_pcm_params(sdev, substream, reply); 47 48 if (ret < 0) 49 dev_err(sdev->dev, "error: got wrong reply for PCM %d\n", 50 spcm->pcm.pcm_id); 51 52 return ret; 53 } 54 55 /* 56 * sof pcm period elapse work 57 */ 58 static void sof_pcm_period_elapsed_work(struct work_struct *work) 59 { 60 struct snd_sof_pcm_stream *sps = 61 container_of(work, struct snd_sof_pcm_stream, 62 period_elapsed_work); 63 64 snd_pcm_period_elapsed(sps->substream); 65 } 66 67 /* 68 * sof pcm period elapse, this could be called at irq thread context. 69 */ 70 void snd_sof_pcm_period_elapsed(struct snd_pcm_substream *substream) 71 { 72 struct snd_soc_pcm_runtime *rtd = substream->private_data; 73 struct snd_soc_component *component = 74 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 75 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 76 struct snd_sof_pcm *spcm; 77 78 spcm = snd_sof_find_spcm_dai(sdev, rtd); 79 if (!spcm) { 80 dev_err(sdev->dev, 81 "error: period elapsed for unknown stream!\n"); 82 return; 83 } 84 85 /* 86 * snd_pcm_period_elapsed() can be called in interrupt context 87 * before IRQ_HANDLED is returned. Inside snd_pcm_period_elapsed(), 88 * when the PCM is done draining or xrun happened, a STOP IPC will 89 * then be sent and this IPC will hit IPC timeout. 90 * To avoid sending IPC before the previous IPC is handled, we 91 * schedule delayed work here to call the snd_pcm_period_elapsed(). 92 */ 93 schedule_work(&spcm->stream[substream->stream].period_elapsed_work); 94 } 95 EXPORT_SYMBOL(snd_sof_pcm_period_elapsed); 96 97 /* this may get called several times by oss emulation */ 98 static int sof_pcm_hw_params(struct snd_pcm_substream *substream, 99 struct snd_pcm_hw_params *params) 100 { 101 struct snd_soc_pcm_runtime *rtd = substream->private_data; 102 struct snd_pcm_runtime *runtime = substream->runtime; 103 struct snd_soc_component *component = 104 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 105 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 106 struct snd_sof_pcm *spcm; 107 struct sof_ipc_pcm_params pcm; 108 struct sof_ipc_pcm_params_reply ipc_params_reply; 109 int ret; 110 111 /* nothing to do for BE */ 112 if (rtd->dai_link->no_pcm) 113 return 0; 114 115 spcm = snd_sof_find_spcm_dai(sdev, rtd); 116 if (!spcm) 117 return -EINVAL; 118 119 dev_dbg(sdev->dev, "pcm: hw params stream %d dir %d\n", 120 spcm->pcm.pcm_id, substream->stream); 121 122 memset(&pcm, 0, sizeof(pcm)); 123 124 /* allocate audio buffer pages */ 125 ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params)); 126 if (ret < 0) { 127 dev_err(sdev->dev, "error: could not allocate %d bytes for PCM %d\n", 128 params_buffer_bytes(params), spcm->pcm.pcm_id); 129 return ret; 130 } 131 if (ret) { 132 /* 133 * ret == 1 means the buffer is changed 134 * create compressed page table for audio firmware 135 * ret == 0 means the buffer is not changed 136 * so no need to regenerate the page table 137 */ 138 ret = create_page_table(substream, runtime->dma_area, 139 runtime->dma_bytes); 140 if (ret < 0) 141 return ret; 142 } 143 144 /* number of pages should be rounded up */ 145 pcm.params.buffer.pages = PFN_UP(runtime->dma_bytes); 146 147 /* set IPC PCM parameters */ 148 pcm.hdr.size = sizeof(pcm); 149 pcm.hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_PARAMS; 150 pcm.comp_id = spcm->stream[substream->stream].comp_id; 151 pcm.params.hdr.size = sizeof(pcm.params); 152 pcm.params.buffer.phy_addr = 153 spcm->stream[substream->stream].page_table.addr; 154 pcm.params.buffer.size = runtime->dma_bytes; 155 pcm.params.direction = substream->stream; 156 pcm.params.sample_valid_bytes = params_width(params) >> 3; 157 pcm.params.buffer_fmt = SOF_IPC_BUFFER_INTERLEAVED; 158 pcm.params.rate = params_rate(params); 159 pcm.params.channels = params_channels(params); 160 pcm.params.host_period_bytes = params_period_bytes(params); 161 162 /* container size */ 163 ret = snd_pcm_format_physical_width(params_format(params)); 164 if (ret < 0) 165 return ret; 166 pcm.params.sample_container_bytes = ret >> 3; 167 168 /* format */ 169 switch (params_format(params)) { 170 case SNDRV_PCM_FORMAT_S16: 171 pcm.params.frame_fmt = SOF_IPC_FRAME_S16_LE; 172 break; 173 case SNDRV_PCM_FORMAT_S24: 174 pcm.params.frame_fmt = SOF_IPC_FRAME_S24_4LE; 175 break; 176 case SNDRV_PCM_FORMAT_S32: 177 pcm.params.frame_fmt = SOF_IPC_FRAME_S32_LE; 178 break; 179 case SNDRV_PCM_FORMAT_FLOAT: 180 pcm.params.frame_fmt = SOF_IPC_FRAME_FLOAT; 181 break; 182 default: 183 return -EINVAL; 184 } 185 186 /* firmware already configured host stream */ 187 ret = snd_sof_pcm_platform_hw_params(sdev, 188 substream, 189 params, 190 &pcm.params); 191 if (ret < 0) { 192 dev_err(sdev->dev, "error: platform hw params failed\n"); 193 return ret; 194 } 195 196 dev_dbg(sdev->dev, "stream_tag %d", pcm.params.stream_tag); 197 198 /* send IPC to the DSP */ 199 ret = sof_ipc_tx_message(sdev->ipc, pcm.hdr.cmd, &pcm, sizeof(pcm), 200 &ipc_params_reply, sizeof(ipc_params_reply)); 201 if (ret < 0) { 202 dev_err(sdev->dev, "error: hw params ipc failed for stream %d\n", 203 pcm.params.stream_tag); 204 return ret; 205 } 206 207 ret = sof_pcm_dsp_params(spcm, substream, &ipc_params_reply); 208 if (ret < 0) 209 return ret; 210 211 /* save pcm hw_params */ 212 memcpy(&spcm->params[substream->stream], params, sizeof(*params)); 213 214 /* clear hw_params_upon_resume flag */ 215 spcm->hw_params_upon_resume[substream->stream] = 0; 216 217 return ret; 218 } 219 220 static int sof_pcm_hw_free(struct snd_pcm_substream *substream) 221 { 222 struct snd_soc_pcm_runtime *rtd = substream->private_data; 223 struct snd_soc_component *component = 224 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 225 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 226 struct snd_sof_pcm *spcm; 227 struct sof_ipc_stream stream; 228 struct sof_ipc_reply reply; 229 int ret; 230 231 /* nothing to do for BE */ 232 if (rtd->dai_link->no_pcm) 233 return 0; 234 235 spcm = snd_sof_find_spcm_dai(sdev, rtd); 236 if (!spcm) 237 return -EINVAL; 238 239 dev_dbg(sdev->dev, "pcm: free stream %d dir %d\n", spcm->pcm.pcm_id, 240 substream->stream); 241 242 stream.hdr.size = sizeof(stream); 243 stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_FREE; 244 stream.comp_id = spcm->stream[substream->stream].comp_id; 245 246 /* send IPC to the DSP */ 247 ret = sof_ipc_tx_message(sdev->ipc, stream.hdr.cmd, &stream, 248 sizeof(stream), &reply, sizeof(reply)); 249 250 snd_pcm_lib_free_pages(substream); 251 252 cancel_work_sync(&spcm->stream[substream->stream].period_elapsed_work); 253 254 if (ret < 0) 255 return ret; 256 257 ret = snd_sof_pcm_platform_hw_free(sdev, substream); 258 if (ret < 0) 259 dev_err(sdev->dev, "error: platform hw free failed\n"); 260 261 return ret; 262 } 263 264 static int sof_pcm_prepare(struct snd_pcm_substream *substream) 265 { 266 struct snd_soc_pcm_runtime *rtd = substream->private_data; 267 struct snd_soc_component *component = 268 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 269 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 270 struct snd_sof_pcm *spcm; 271 int ret; 272 273 /* nothing to do for BE */ 274 if (rtd->dai_link->no_pcm) 275 return 0; 276 277 spcm = snd_sof_find_spcm_dai(sdev, rtd); 278 if (!spcm) 279 return -EINVAL; 280 281 /* 282 * check if hw_params needs to be set-up again. 283 * This is only needed when resuming from system sleep. 284 */ 285 if (!spcm->hw_params_upon_resume[substream->stream]) 286 return 0; 287 288 dev_dbg(sdev->dev, "pcm: prepare stream %d dir %d\n", spcm->pcm.pcm_id, 289 substream->stream); 290 291 /* set hw_params */ 292 ret = sof_pcm_hw_params(substream, &spcm->params[substream->stream]); 293 if (ret < 0) { 294 dev_err(sdev->dev, "error: set pcm hw_params after resume\n"); 295 return ret; 296 } 297 298 return 0; 299 } 300 301 /* 302 * FE dai link trigger actions are always executed in non-atomic context because 303 * they involve IPC's. 304 */ 305 static int sof_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 306 { 307 struct snd_soc_pcm_runtime *rtd = substream->private_data; 308 struct snd_soc_component *component = 309 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 310 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 311 struct snd_sof_pcm *spcm; 312 struct sof_ipc_stream stream; 313 struct sof_ipc_reply reply; 314 int ret; 315 316 /* nothing to do for BE */ 317 if (rtd->dai_link->no_pcm) 318 return 0; 319 320 spcm = snd_sof_find_spcm_dai(sdev, rtd); 321 if (!spcm) 322 return -EINVAL; 323 324 dev_dbg(sdev->dev, "pcm: trigger stream %d dir %d cmd %d\n", 325 spcm->pcm.pcm_id, substream->stream, cmd); 326 327 stream.hdr.size = sizeof(stream); 328 stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG; 329 stream.comp_id = spcm->stream[substream->stream].comp_id; 330 331 switch (cmd) { 332 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 333 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_PAUSE; 334 break; 335 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 336 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_RELEASE; 337 break; 338 case SNDRV_PCM_TRIGGER_RESUME: 339 /* set up hw_params */ 340 ret = sof_pcm_prepare(substream); 341 if (ret < 0) { 342 dev_err(sdev->dev, 343 "error: failed to set up hw_params upon resume\n"); 344 return ret; 345 } 346 347 /* fallthrough */ 348 case SNDRV_PCM_TRIGGER_START: 349 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_START; 350 break; 351 case SNDRV_PCM_TRIGGER_SUSPEND: 352 case SNDRV_PCM_TRIGGER_STOP: 353 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_STOP; 354 break; 355 default: 356 dev_err(sdev->dev, "error: unhandled trigger cmd %d\n", cmd); 357 return -EINVAL; 358 } 359 360 snd_sof_pcm_platform_trigger(sdev, substream, cmd); 361 362 /* send IPC to the DSP */ 363 ret = sof_ipc_tx_message(sdev->ipc, stream.hdr.cmd, &stream, 364 sizeof(stream), &reply, sizeof(reply)); 365 366 if (ret < 0 || cmd != SNDRV_PCM_TRIGGER_SUSPEND) 367 return ret; 368 369 /* 370 * The hw_free op is usually called when the pcm stream is closed. 371 * Since the stream is not closed during suspend, the DSP needs to be 372 * notified explicitly to free pcm to prevent errors upon resume. 373 */ 374 stream.hdr.size = sizeof(stream); 375 stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_FREE; 376 stream.comp_id = spcm->stream[substream->stream].comp_id; 377 378 /* send IPC to the DSP */ 379 return sof_ipc_tx_message(sdev->ipc, stream.hdr.cmd, &stream, 380 sizeof(stream), &reply, sizeof(reply)); 381 } 382 383 static snd_pcm_uframes_t sof_pcm_pointer(struct snd_pcm_substream *substream) 384 { 385 struct snd_soc_pcm_runtime *rtd = substream->private_data; 386 struct snd_soc_component *component = 387 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 388 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 389 struct snd_sof_pcm *spcm; 390 snd_pcm_uframes_t host, dai; 391 392 /* nothing to do for BE */ 393 if (rtd->dai_link->no_pcm) 394 return 0; 395 396 /* use dsp ops pointer callback directly if set */ 397 if (sof_ops(sdev)->pcm_pointer) 398 return sof_ops(sdev)->pcm_pointer(sdev, substream); 399 400 spcm = snd_sof_find_spcm_dai(sdev, rtd); 401 if (!spcm) 402 return -EINVAL; 403 404 /* read position from DSP */ 405 host = bytes_to_frames(substream->runtime, 406 spcm->stream[substream->stream].posn.host_posn); 407 dai = bytes_to_frames(substream->runtime, 408 spcm->stream[substream->stream].posn.dai_posn); 409 410 dev_dbg(sdev->dev, "PCM: stream %d dir %d DMA position %lu DAI position %lu\n", 411 spcm->pcm.pcm_id, substream->stream, host, dai); 412 413 return host; 414 } 415 416 static int sof_pcm_open(struct snd_pcm_substream *substream) 417 { 418 struct snd_soc_pcm_runtime *rtd = substream->private_data; 419 struct snd_pcm_runtime *runtime = substream->runtime; 420 struct snd_soc_component *component = 421 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 422 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 423 struct snd_sof_pcm *spcm; 424 struct snd_soc_tplg_stream_caps *caps; 425 int ret; 426 427 /* nothing to do for BE */ 428 if (rtd->dai_link->no_pcm) 429 return 0; 430 431 spcm = snd_sof_find_spcm_dai(sdev, rtd); 432 if (!spcm) 433 return -EINVAL; 434 435 dev_dbg(sdev->dev, "pcm: open stream %d dir %d\n", spcm->pcm.pcm_id, 436 substream->stream); 437 438 INIT_WORK(&spcm->stream[substream->stream].period_elapsed_work, 439 sof_pcm_period_elapsed_work); 440 441 caps = &spcm->pcm.caps[substream->stream]; 442 443 /* set any runtime constraints based on topology */ 444 snd_pcm_hw_constraint_step(substream->runtime, 0, 445 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 446 le32_to_cpu(caps->period_size_min)); 447 snd_pcm_hw_constraint_step(substream->runtime, 0, 448 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 449 le32_to_cpu(caps->period_size_min)); 450 451 /* set runtime config */ 452 runtime->hw.info = SNDRV_PCM_INFO_MMAP | 453 SNDRV_PCM_INFO_MMAP_VALID | 454 SNDRV_PCM_INFO_INTERLEAVED | 455 SNDRV_PCM_INFO_PAUSE | 456 SNDRV_PCM_INFO_NO_PERIOD_WAKEUP; 457 runtime->hw.formats = le64_to_cpu(caps->formats); 458 runtime->hw.period_bytes_min = le32_to_cpu(caps->period_size_min); 459 runtime->hw.period_bytes_max = le32_to_cpu(caps->period_size_max); 460 runtime->hw.periods_min = le32_to_cpu(caps->periods_min); 461 runtime->hw.periods_max = le32_to_cpu(caps->periods_max); 462 463 /* 464 * caps->buffer_size_min is not used since the 465 * snd_pcm_hardware structure only defines buffer_bytes_max 466 */ 467 runtime->hw.buffer_bytes_max = le32_to_cpu(caps->buffer_size_max); 468 469 dev_dbg(sdev->dev, "period min %zd max %zd bytes\n", 470 runtime->hw.period_bytes_min, 471 runtime->hw.period_bytes_max); 472 dev_dbg(sdev->dev, "period count %d max %d\n", 473 runtime->hw.periods_min, 474 runtime->hw.periods_max); 475 dev_dbg(sdev->dev, "buffer max %zd bytes\n", 476 runtime->hw.buffer_bytes_max); 477 478 /* set wait time - TODO: come from topology */ 479 substream->wait_time = 500; 480 481 spcm->stream[substream->stream].posn.host_posn = 0; 482 spcm->stream[substream->stream].posn.dai_posn = 0; 483 spcm->stream[substream->stream].substream = substream; 484 485 ret = snd_sof_pcm_platform_open(sdev, substream); 486 if (ret < 0) 487 dev_err(sdev->dev, "error: pcm open failed %d\n", ret); 488 489 return ret; 490 } 491 492 static int sof_pcm_close(struct snd_pcm_substream *substream) 493 { 494 struct snd_soc_pcm_runtime *rtd = substream->private_data; 495 struct snd_soc_component *component = 496 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 497 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 498 struct snd_sof_pcm *spcm; 499 int err; 500 501 /* nothing to do for BE */ 502 if (rtd->dai_link->no_pcm) 503 return 0; 504 505 spcm = snd_sof_find_spcm_dai(sdev, rtd); 506 if (!spcm) 507 return -EINVAL; 508 509 dev_dbg(sdev->dev, "pcm: close stream %d dir %d\n", spcm->pcm.pcm_id, 510 substream->stream); 511 512 err = snd_sof_pcm_platform_close(sdev, substream); 513 if (err < 0) { 514 dev_err(sdev->dev, "error: pcm close failed %d\n", 515 err); 516 /* 517 * keep going, no point in preventing the close 518 * from happening 519 */ 520 } 521 522 return 0; 523 } 524 525 static struct snd_pcm_ops sof_pcm_ops = { 526 .open = sof_pcm_open, 527 .close = sof_pcm_close, 528 .ioctl = snd_pcm_lib_ioctl, 529 .hw_params = sof_pcm_hw_params, 530 .prepare = sof_pcm_prepare, 531 .hw_free = sof_pcm_hw_free, 532 .trigger = sof_pcm_trigger, 533 .pointer = sof_pcm_pointer, 534 .page = snd_pcm_sgbuf_ops_page, 535 }; 536 537 /* 538 * Pre-allocate playback/capture audio buffer pages. 539 * no need to explicitly release memory preallocated by sof_pcm_new in pcm_free 540 * snd_pcm_lib_preallocate_free_for_all() is called by the core. 541 */ 542 static int sof_pcm_new(struct snd_soc_pcm_runtime *rtd) 543 { 544 struct snd_soc_component *component = 545 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 546 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 547 struct snd_sof_pcm *spcm; 548 struct snd_pcm *pcm = rtd->pcm; 549 struct snd_soc_tplg_stream_caps *caps; 550 int stream = SNDRV_PCM_STREAM_PLAYBACK; 551 552 /* find SOF PCM for this RTD */ 553 spcm = snd_sof_find_spcm_dai(sdev, rtd); 554 if (!spcm) { 555 dev_warn(sdev->dev, "warn: can't find PCM with DAI ID %d\n", 556 rtd->dai_link->id); 557 return 0; 558 } 559 560 dev_dbg(sdev->dev, "creating new PCM %s\n", spcm->pcm.pcm_name); 561 562 /* do we need to pre-allocate playback audio buffer pages */ 563 if (!spcm->pcm.playback) 564 goto capture; 565 566 caps = &spcm->pcm.caps[stream]; 567 568 /* pre-allocate playback audio buffer pages */ 569 dev_dbg(sdev->dev, "spcm: allocate %s playback DMA buffer size 0x%x max 0x%x\n", 570 caps->name, caps->buffer_size_min, caps->buffer_size_max); 571 572 snd_pcm_lib_preallocate_pages(pcm->streams[stream].substream, 573 SNDRV_DMA_TYPE_DEV_SG, sdev->dev, 574 le32_to_cpu(caps->buffer_size_min), 575 le32_to_cpu(caps->buffer_size_max)); 576 capture: 577 stream = SNDRV_PCM_STREAM_CAPTURE; 578 579 /* do we need to pre-allocate capture audio buffer pages */ 580 if (!spcm->pcm.capture) 581 return 0; 582 583 caps = &spcm->pcm.caps[stream]; 584 585 /* pre-allocate capture audio buffer pages */ 586 dev_dbg(sdev->dev, "spcm: allocate %s capture DMA buffer size 0x%x max 0x%x\n", 587 caps->name, caps->buffer_size_min, caps->buffer_size_max); 588 589 snd_pcm_lib_preallocate_pages(pcm->streams[stream].substream, 590 SNDRV_DMA_TYPE_DEV_SG, sdev->dev, 591 le32_to_cpu(caps->buffer_size_min), 592 le32_to_cpu(caps->buffer_size_max)); 593 594 return 0; 595 } 596 597 /* fixup the BE DAI link to match any values from topology */ 598 static int sof_pcm_dai_link_fixup(struct snd_soc_pcm_runtime *rtd, 599 struct snd_pcm_hw_params *params) 600 { 601 struct snd_interval *rate = hw_param_interval(params, 602 SNDRV_PCM_HW_PARAM_RATE); 603 struct snd_interval *channels = hw_param_interval(params, 604 SNDRV_PCM_HW_PARAM_CHANNELS); 605 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 606 struct snd_soc_component *component = 607 snd_soc_rtdcom_lookup(rtd, DRV_NAME); 608 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 609 struct snd_sof_dai *dai = 610 snd_sof_find_dai(sdev, (char *)rtd->dai_link->name); 611 612 /* no topology exists for this BE, try a common configuration */ 613 if (!dai) { 614 dev_warn(sdev->dev, "warning: no topology found for BE DAI %s config\n", 615 rtd->dai_link->name); 616 617 /* set 48k, stereo, 16bits by default */ 618 rate->min = 48000; 619 rate->max = 48000; 620 621 channels->min = 2; 622 channels->max = 2; 623 624 snd_mask_none(fmt); 625 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE); 626 627 return 0; 628 } 629 630 /* read format from topology */ 631 snd_mask_none(fmt); 632 633 switch (dai->comp_dai.config.frame_fmt) { 634 case SOF_IPC_FRAME_S16_LE: 635 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE); 636 break; 637 case SOF_IPC_FRAME_S24_4LE: 638 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S24_LE); 639 break; 640 case SOF_IPC_FRAME_S32_LE: 641 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S32_LE); 642 break; 643 default: 644 dev_err(sdev->dev, "error: No available DAI format!\n"); 645 return -EINVAL; 646 } 647 648 /* read rate and channels from topology */ 649 switch (dai->dai_config->type) { 650 case SOF_DAI_INTEL_SSP: 651 rate->min = dai->dai_config->ssp.fsync_rate; 652 rate->max = dai->dai_config->ssp.fsync_rate; 653 channels->min = dai->dai_config->ssp.tdm_slots; 654 channels->max = dai->dai_config->ssp.tdm_slots; 655 656 dev_dbg(sdev->dev, 657 "rate_min: %d rate_max: %d\n", rate->min, rate->max); 658 dev_dbg(sdev->dev, 659 "channels_min: %d channels_max: %d\n", 660 channels->min, channels->max); 661 662 break; 663 case SOF_DAI_INTEL_DMIC: 664 /* DMIC only supports 16 or 32 bit formats */ 665 if (dai->comp_dai.config.frame_fmt == SOF_IPC_FRAME_S24_4LE) { 666 dev_err(sdev->dev, 667 "error: invalid fmt %d for DAI type %d\n", 668 dai->comp_dai.config.frame_fmt, 669 dai->dai_config->type); 670 } 671 break; 672 case SOF_DAI_INTEL_HDA: 673 /* do nothing for HDA dai_link */ 674 break; 675 default: 676 dev_err(sdev->dev, "error: invalid DAI type %d\n", 677 dai->dai_config->type); 678 break; 679 } 680 681 return 0; 682 } 683 684 static int sof_pcm_probe(struct snd_soc_component *component) 685 { 686 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 687 struct snd_sof_pdata *plat_data = sdev->pdata; 688 const char *tplg_filename; 689 int ret; 690 691 /* load the default topology */ 692 sdev->component = component; 693 694 tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL, 695 "%s/%s", 696 plat_data->tplg_filename_prefix, 697 plat_data->tplg_filename); 698 if (!tplg_filename) 699 return -ENOMEM; 700 701 ret = snd_sof_load_topology(sdev, tplg_filename); 702 if (ret < 0) { 703 dev_err(sdev->dev, "error: failed to load DSP topology %d\n", 704 ret); 705 return ret; 706 } 707 708 /* 709 * Some platforms in SOF, ex: BYT, may not have their platform PM 710 * callbacks set. Increment the usage count so as to 711 * prevent the device from entering runtime suspend. 712 */ 713 if (!sof_ops(sdev)->runtime_suspend || !sof_ops(sdev)->runtime_resume) 714 pm_runtime_get_noresume(sdev->dev); 715 716 return ret; 717 } 718 719 static void sof_pcm_remove(struct snd_soc_component *component) 720 { 721 /* remove topology */ 722 snd_soc_tplg_component_remove(component, SND_SOC_TPLG_INDEX_ALL); 723 } 724 725 void snd_sof_new_platform_drv(struct snd_sof_dev *sdev) 726 { 727 struct snd_soc_component_driver *pd = &sdev->plat_drv; 728 struct snd_sof_pdata *plat_data = sdev->pdata; 729 const char *drv_name; 730 731 drv_name = plat_data->machine->drv_name; 732 733 pd->name = "sof-audio-component"; 734 pd->probe = sof_pcm_probe; 735 pd->remove = sof_pcm_remove; 736 pd->ops = &sof_pcm_ops; 737 #if IS_ENABLED(CONFIG_SND_SOC_SOF_COMPRESS) 738 pd->compr_ops = &sof_compressed_ops; 739 #endif 740 pd->pcm_new = sof_pcm_new; 741 pd->ignore_machine = drv_name; 742 pd->be_hw_params_fixup = sof_pcm_dai_link_fixup; 743 pd->be_pcm_base = SOF_BE_PCM_BASE; 744 pd->use_dai_pcm_id = true; 745 pd->topology_name_prefix = "sof"; 746 747 /* increment module refcount when a pcm is opened */ 748 pd->module_get_upon_open = 1; 749 } 750